Volvox in South Africa. 



591 



A 6.64 p.m. 



D 7 p.m. 



E 7.30 p.m. 



G 8.8 p.m. 



J 8.22 p.m. 



H 8.17 p.m. 



K 9.16 p.m. 



I 8.20 p.m. 



L 10 p.m. . 

 FIG. 6. V. Rousseletii. Inversion of sperm globoid. 



A, B, Preparation ; C-K, inversion ; L, fully formed, recently inverted globoid. 



All x 750 approximately. 



